dummyagent.c (Agent_OnLoad): Add missing return value.

* testsuite/libjava.jvmti/dummyagent.c (Agent_OnLoad):
        Add missing return value.

From-SVN: r125594

libjava/testsuite/libjava.jvmti/dummyagent.c

@@ -5,5 +5,6 @@ Agent_OnLoad (JavaVM *vm, char *options, void *reserved)
 {
   // nothing -- this is just a stub to get JVMTI properly
   // initialized
+  return 0;
 }